Colter is most famous for leading the unionization efforts by Northwestern's football players in 2014. The National Labor Relations Board "declined to assert jurisdiction" in August 2015, however, despite a regional NLRB director deciding that Northwestern's football players were employees, per Tom Farrey of ESPN.

While that represented a setback, Colter remained optimistic at the time.

"Me and Ramogi and a bunch of other people saw (the NLRB decision) going differently, but this isn't the end," he told Farrey. "This isn't going to stop us from pushing for college athlete rights. That will eventually come. If it's not going to happen this way, we'll get it another way."

Colter went undrafted in 2014 but was signed by the Minnesota Vikings, though he never appeared in a game and was ultimately released. He made the transition to wide receiver with the team.

At Northwestern, he filled a variety of roles, throwing for 2,160 yards and 18 touchdowns, rushing for 2,180 yards and 28 scores and catching 63 passes for 683 yards and four touchdowns in four seasons. With the Rams, he'll likely be utilized in a hybrid role, similarly to how the team gets Tavon Austin touches in both the pass and run games.